[en] Described is the track filtration algorithm based on the track mathematical model and on the methods of the statistical decision theory. The described algorithm is realized in the NEWFIL program designed within the framework of modular system HYDRA. Use of the program has revealed a rather high rate of operation. Average time required for analyzing the reference cross marks is about 5 s/projection. The rate of filtration of an event on the projection based on scanning data is 1.8 s/event

[en] A method of divinyl telluride preparation by Te interaction with acetylene at 90-120 deg C and 10-15 8t pressure in the presence of alkali and water, as well as tin chloride at molar relation to tellurium of 1-1.5:1 is proposed. SnCl₂ presence increases the divinyl tulluride yield up to 94% while the yield of product for special purpose by the prototype method without SnCl₂ in the polar aproton solvent medium is only 40% The proposed method considerably simplifies the technology of process, as well as increases purity of the product for special purpose

[en] Characteristics of full destruction (FD) (disintegration only into one and double charge fragments) light nucleus-shells ₆¹²C, ₈¹⁶O, ₁₀²²Ne, ₁₄²⁸Si with energy 3.7A GeV and heavy - ₇₉¹⁹⁷Au (10.7A GeV) and ₈₂²⁰⁸Pb (158A GeV) in their interaction with nucleus in photoemulsion are submitted. It is shown that: a) the average number of fragments, realization of channels of disintegration into fragments, a degree of 'crushing' of light nucleus-shells essentially depend on a charge of a residual nucleus and weight of a target nucleus; b) probability of FD of residual nucleus with an identical charge, plurality of fragments for identical parameters of impact of heavy nucleus-shells do not depend on their energy; c) in integrated distribution of cross-section transverse momentum double charge fragments the break (it is described by two exponents) is observed

[en] Experimental data on research process of total destruction of light nuclei (₆C¹², ₈O¹⁶, ₁₀Ne²², ₁₄Si²⁸) in their interaction with a pulse 4.1-4.5 A GeV/s light and heavy nuclei in photo-emulsion are submitted. It is shown, that characteristics of this process (probability, an average of fragments, a degree of 'crushing', probability of channels of disintegration fragments) depend on a charge of residual nucleus and nuclear weight of a primary nucleus. (author)

[en] Possible mechanisms of light nuclei fragment production are studied. Correlation < n_b>=f(n_g) for light nuclei-projectiles of ²²Ne with kinetic energy 3.7 GeV/nucleon is considered. The received results showed that behavior of mean number of fragments and their mean charges in dependence of interacted protons (n_g^') indicate realisation of both fragmentation mechanisms - the vapor one under small n_g^' and multi-fragmentation - under large one. A-dependence of characteristics relating to these both mechanisms is revealed as well

[en] The production of antiD⁰-mesons on hydrogen and nuclear targets (carbon and aluminium) by (38-70) GeV neutrons has been analyzed. The decay mode antiD⁰→K⁺π^-π⁺π^- was studied. The longitudinal p_L and transverse p_T momenta were reconstructed and described by the forms (1-X_F)^N with N=2.3_-0.3^+0.2 and exp(-Bp_T²) with B=(1.3_-0.3^+0.2)(GeV/c)^-2, respectively. In the sensitive kinematic region of (30≤p_L≤60) GeV/c (X_F>0.5) and p_T≤1 GeV/c the cross sections are: σ_H2=(3.1±1.1) μb, σ_C=(27.5±9.3) μb/C nucleus and σ_Al=(49.6±16.3) μb/Al nucleus. The dependence of the antiD⁰-production cross section on the atomic weight A was parametrized by the power law form σ_A=Kσ_H2A^α with K=1.5±0.8 and α=0.73±0.23. (author) 1 tab., 6 figs., 11 refs

[en] The results of a search for the charmed strange baryon Ξ_c⁺ in the final states Λ⁰π⁺π⁺K^- and Ξ^-π⁺π⁺ are presented. The experiment was performed using the magnetic spectrometer BIS-2 with a hydrogen target located in the neutron beam of the Serpukhov accelerator. A narrow peak in the Λ⁰π⁺π⁺K^- state is observed at a mass of ≅2440 and possibly also of ≅2310 MeV/c², corresponding to signals for the Ξ_c⁺→Λ⁰π⁺π⁺K^- and Ξ_c⁺→Σ⁰π⁺π⁺K^- (Σ⁰→Λ⁰γ) decays respectively. The statistics obtained for the Ξ^-π⁺π⁺ state is too low to allow any conclusion to be made. (author). 8 figs., 9 refs

[en] Full text: A study of nucleus-nuclei interactions at relativistic and ultra-relativistic energies is an actual problem on many causes, and specifically, there is an unique opportunity to study properties of nuclear matter at high densities and temperatures, to reveal some features of processes of multiparticle production and of multifragmentation of colliding nuclei as well as to carry out a search of a manifestation of quark-gluon plasma. The larger mass and energy of colliding nuclei the larger favourable conditions for decision of those problems. In our paper there are presented results of the study of the interaction of Au¹⁹⁷ (10.7 GeV/nucleon the accelerator of BNL, USA) and Pb²⁰⁸ (158 GeV/nucleon, supercollider, CERN Geneva) with nuclei of atoms, including into a composition of thick-layer photo-emulsion. There is carried out the comparative analysis of obtained experimental data (characteristics of all secondary charged particles and fragments of colliding nuclei) with the purpose to compare experiments, in which initial nuclei are ones having similar masses and considerably distinguishing on energy. And what's more there are analysed central (there are observed fragments of nucleus - projectile with charges z_f≤2 only) and peripheral (a presence of multicharged fragments, z_f≥3) interactions. Besides, results of each experiment are compared with characteristics of events performed within the framework of the Cascade - Evaporative Model

[en] Results are presented of a study of the exclusive diffractive reaction np→Λ⁰K⁰p at 0.08<|t|>0.53 GeV2²/c² and momenta between 30-70 GeV/c at the Serpukhov neutron beam. The t-dependence is exp (Bt) with B=11.4±2.3 (GeV/c)^-2 and it exhibits the diffractive minimum at |t|∼0.28 GeV²/c² for Λ⁰K⁰ masses M<1.8 GeV/c². B decreases with increasing M. Correlation with the beam direction is observed in the rest frame of the Λ⁰K⁰ system: the cross section increases for the forward-going Λ⁰. The increase is more pronounced for higher M. The cross section of reaction np→Λ⁰K⁰p for 0<|t|<0.53 GeV²/c² is 10.3 ±2.5±2.8 μb. (author). 8 figs., 2 tabs., 20 refs

[en] The inclusive production was studied of charmed baryon Λ_c⁺ in interactions of 40 to 70 GeV/c neutrons with protons of a hydrogen target. The experiment was performed with the use of magnetic spectrometer BIS-2 located in the neutron beam of the Serpukhov accelerator. The signal of Λ_c⁺ was observed in the effective mass spectra of Λ⁰π⁺π⁺π^-. After the removal of interactions occurring on the container of liquid hydrogen, the signal consisted of 14 combinations corresponding to ∼4 standard deviations of background. Its mean value was 2262 MeV/c², the width of the bin containing signal was 20 MeV/c². On the basis of this signal the value was determined of the cross section of Λ_c⁺ production times the branching ratio of its observed decay mode σxBr(Λ_c⁺→Λ⁰π⁺π⁺π^-) = 0.26±0.11 μb in the kinematic region of x_F>0.5 and p_T<1 GeV/c. (author). 10 figs., 15 refs